andersen



(No Model.) 2 Sheets-Sheet 1.

J. M. ANDERSEN.

TROL-LEY ATTACHMENT FOR ELECTRIC RAILWAY (was.

No. 412,157. Patented Oct. 1, 1889. F994.

75 @Q. Jamal M75670; ZWM W. @W %E (No Model.) 2 Sheets-Sheet 2.

J. M, ANDERSEN.

TROLLEY ATTACHMENT FOR ELECTRIC RAILWAY ems.

No. 412,157 Patented Oct. 1, 1889.-

J okavufl anazenswv UNITED STATES PATENT rrrcE.

JOI-IAN M. ANDERSEN, or BO TON, MASSACHUSETTS, ASSIGNOR T0 CHARLES L.EDGAR, TRUSTEE, or SAME PLACE.

TROLLEY ATTACHM ENT FOR ELECTRIC-RA! LWAY CARS.

SPECIFICATION formingpart of Letters Patent No.412,157, dated October 1,1889. Application filed June 29, 1889. Serial No. 316,031. (No model.)

To all whom it may concern.-

Be it known that I, JoHAN M. ANDER-SEN, of Boston, county of Suifolk,State of Massachusetts, have invented an Improvement in TrolleyAttachments for Electric-Railway Cars, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like letters on the drawings representing like parts.

In operating street-cars by electricity conveyed through a wire orconductor on which runs a trolley-wheel attached to a car much troubleis experienced in keeping the trolleywheel pressed sufiiciently close tothe wire or conductor, or in causing the trolley-wheel to follow thewire, notwithstanding difierences in tension of the wire or itsdisplacement with relation to the track, and many "forms of springs havebeen used to efi'ect this contact properly; but all are more or lessdefective.

To insure proper vertical pressure of the trolley-wheel on the wire orconductor, Ihave provided the car with a stand in whichlhave mounted aspring-held rock-shaft having ears or projections to form bearings for atrolleypole holder, the said rock-shaft having an arm or arms extendedfrom it substantially at right angles to the said ears or projections,and having engaging points (preterably 3c notches) located at oppositesides of aline intersecting the center of movement 01": the said shaft,the said arm or arms being engaged by heads having pins or projectionsto enter the said notches, sets of strong springs having greatelasticity and power of quick recovery co-operating with the said headsto cause them, in engagement with the arm or arms of the saidrock-shaft, to keep the trolley-wheel pressed vertically and snuglyagainst the wire or conductor whenever the trolley-pole is defiectedlittle or much from a perpendicular toward either end of the car.

The lower end of the trolley-pole holder is acted upon by springs, whichenable the trolley-wheel running on the wire to move laterally or towardeither side of the car when the wire or conductor is displaced or is outof line with the track, and also when the car is running onv a curvedpart of the track.

50 The trolley-pole has to be pointed toward one or the other end of thecar, according to the direction in which the car is to run.

- The head and springs referred to act normally to keep the trolley-poleholder in sub stantially vertical position; but when the said 5 5 poleis tipped over toward either end of the car then one or the other of thepins or studs of the head (not both) remains in contact with one or theother of the notches in the arm of the said rock-shaft, thusenabling thestrain of the said springs to be instantaneously applied to the said armabove or below the center of motion of the said rock-shaft, as the casemay be, and this with but the slightest displacement of the trolley-polefrom vertical position, the said springs keeping the trolleywheelagainst the wire or conductor whatever may be the direction of movementof the car.

My invention in trolley attachments con- 7c sists, essentially, in atrolley-pole-holding arm having provision for vertical and lateralmovement, such movements being controlled by springs, as will behereinafter described.

Figure l in plan View shows part of the 7 5 top of a car with myimproved trolley attachment thereon Fig. 2 is a Section in the line 00,Fig. 1, the said figure showing part of the trolley-pole. Fig. 3 is aside elevation of the parts shown in Fig. l, with part of the trol- 8oley-pole. Fig. 4 shows the trolley-pole holder detached. Fig. 5 is apartial section in the line (13', Fig. 1. Fig. 6 is a detail showingpart of the rock-shaft, with its arm and the head, but in a differentposition. Fig. '7 shows the trolley-pole detached, together with atrolleywheel at its upper end, the wire or conductor being shown insection; and Fig. 8 is a modification to be referred to.

The car-bodyAl1as secured to it firmly by 0 suitable bolts A v a strongmetal stand B, having suitable bearings for a rock-shaft 0. (Shown ashaving three lugs 2, 3, and 4, ears 0 c, and arms 0 c, the latterprojecting from the rock-shaft substantially at right angles to the saidears 0 c.) The arms 0 0' (shown best in Figs. 3, 5, and 6) have twoengagingpoints. (Shown as notches 5 6, the notch 5 being above and thenotch 6 below the center of the said rock-shaft.) These arms have co-10o stand in vertical position.

operating with them a head 1), containing two pins or studs 1) 19 one toenter the notch 5 and the other the notch 6,and when each pin enters thenotch opposite to it the parts will be as in Figs. 1 to 3, and thetrolley-pole will Each head I) is acted upon by a set of what I callpullingsprings intermediate the head and a rocking block 6 havingjournals and mounted in ears I) of a suitable stand 17 fixed to the carat a distance from the stand B. I

Each set of pulling-springs is herein shown as consisting of,preferably, a number of strong spiral springs d of great elasticity.(Shown as securely attached at their ends to short rods or plugs d, inturn pivoted at (Z to blocks d d the block (1 being connected by a link6 or otherwise in suitable manner to a pin 8 of a head Z2.) The block (1has connected to it a screw-rod e, which is extended through thepivot-block e and has applied to it a nut e by which to adjust thetension of the said pulling-springs.

The two sets of pulling-springs d, substan tially alike, are connectedby a rod or link, as e.

The lugs 2 3 4 receive loosely within them a screw-rod f, surrounded ateach side the lug 3 by like springs f f the end of each spring nearestthe lug resting against a washer, as 10, while at the opposite end ofeach spring is a washer 12, which is acted upon by an adjustable nut 13,the rotation of the said nuts on the said screw-rod regulatin g theeffective strength of the said pullingsprings in keeping thetrolley-wheel vertically against the wire.

I have shown, as I prefer to use, pullingsprings. The screw-rod f isheld in place by nuts 14, screwed upon its ends. The ears or projectionsc 0, extended upwardly from the rock-shaft 0, receive a pin 0, whichconstitutes the fulcrum for the trolley-pole holder g, the forked lowerend 9* of which (see Fig. 4) is shaped to embrace the lug 3 and comebetween it and the two washers 10.

The trolley-pole g (partially shown in Figs. 2, 3, and 7, and of usualmaterial) is inserted in the socket in the upper end of the holder whereit is clamped by a suitable clampscrew 9 The upper end of thetrolley-pole g has a trolley-frame provided with a trolley-wheel g whichruns on the usual wire or conductor 10, the springs g g 'permitting thetrolleyholder g 'to tip, thereby enabling the trolleywheel to correctlyfollow along and remain upon and not jump from the said wire orconductor when the car is upon a curved part of the track, or when forany reason the wire is not central with relation to the track.

Normally the pulling-springs cZ act to keep the trolley holder and polein vertical position'; but when a car is run out upon the track thetrolley-pole is bent down "toward one or the other end of the car,according to the direction in which the car is to be run,

untilthe trolley-wheel contacts with the wire or conductor. p

If the trolley-pole is to be turned over in the direction of the arrow16, Fig. 3, the rockshaft 0 will beturned and move the arms 0' thereofin the direction of the arrow 17, carrying the notch 5 of the said arm 0(see Fig. 6) back away from the pin b and throwing the entire effectivestrain of the pullingsprings cl upon the pins b to thus force thetrolley-pole in a direction opposite the arrow 16 and the wheel gagainst the wire or conductor to. On the other hand, should the operatorpull the trolley-pole g down forcibly to the right from the positionFig. 3, then the arm 0' will be carried up in a direction opposite thearrow 17, and in so doing the notch 6 of the said arm will retire fromthe spring or stud b andthe entire strength of the spring will beexerted upon the pins or studs bin the notches 5 of the arms a. It willthus be seen that the series of very strong pulling-springsone series,preferably, at each end of the rock-shaft C and at one side thereofactto keep the trolley-wheel in close contact Vertically with the usualwire or conductor, notwithstanding the trolley-pole is inclined towardone or toward the other end of the car; and it will be seen that thetrolleywheel can not leave the said wire or conductor, for the springs ff permit the wheel to move laterally for a distance sufficient tocompensate for any deviation of the wire from the center of the tracks.

I do not wish to limit my invention to the exact shape of the arms 0 andof the head I), and I desire it to be understoodthat the gist of myinvention as to the said arms and head comprehends a loose connection orcontact of the said parts above and below a line drawn to intersect thecenter of the said rock-shaft, whereby the said pulling-springs, whenthe trolley-pole is turned toward either end of the car, act to keep thetrolley-wheel pressed against the wire or conductor-as, for instance,the arm might be shaped as in Fig. 8.

By employing two sets of springs, as cl, one near each end of therock-shaft, and by using several springs in each set, I get a moreuniform and stronger pull than were but one set of springs used, or werethe springs larger and stronger and but one used.

By employing two springs, as f f and cansing the forked lower end of thepole-holder to embrace the lug 3 of the rock-shaft between the washers10 10, which bear against the lug 3, each spring operates independentlyof the other to aid in keeping the socket in the holder at right anglesto the rock-shaft O.

I do not desire to limit my invention to the exact construction of thepullingsprings, or to the exact form of blocks with which they areconnected, or to the exact form of connecting devicessuoh as e eto unitethe springs with the rock-shaft O and a fixed part of the car; nor do Idesire to limit my invention to the exact number of springs employed,nor to their exact shape, as instead of the particular pulling-springs dherein shown I may use any other well-known equiv: alent springs capableof operating in like manner.

I should consider it within the scope of my invention if the notches 5 6were transferred to the head and the pins or studs 1) b to the arms a.

I claim 1. A rock-shaft, as 0, having an arm, as c, and a connectedtrolley-pole holder, combined with a head havin g pins or projectionsshaped to engage the said arm, as described, atop- .posite sides of aline intersecting the said rock-shaft, and springs co-operatin g withthe said head to keep the trolley-pole holder pressed in the directionto keep the trolle wheel vertically against the usual wire or conductorwhatever may be the direction of movement of the car, substantially asdescribed.

2. The stand, a rock-shaft, as O, therein having ears 0, and a pivotedtrolley-pole holder, combined with springs co-0perating with the saidholder, whereby it may tip on the said rock-shaft to enable thetrolley-wheel to move laterally, as required, and follow along andremain upon the wire or conductor notwithstanding differences ofcurvature between the track and wire, substantially as described.

3. The stand, the rock-shaft therein having arms 0', ears 0, and lugs 23 4, the rod f, springs surrounding the rod, the pivoted trolley-poleholder having its lower end placed under the control of the saidsprings, and the trolley-pole and trolley-wheel, combined with the headand the springs connected thereto, as described, to cause the head todraw upon a part of the said arms in all positions of the trolley-poleholder and pole, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHAN M. ANDERSEN.

"Witnesses:

BERNICE J. Novns, Gno. W. GREGORY.

